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...cornelia.huck at de.ibm.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 7b6d74f..476c0e3 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -75,7 +75,7 @@ struct virtio_balloon { /* The array of pfns we tell the Host about. */ unsigned int num_pfns; - u32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX]; + __virtio32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX];...

...cornelia.huck at de.ibm.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 7b6d74f..476c0e3 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -75,7 +75,7 @@ struct virtio_balloon { /* The array of pfns we tell the Host about. */ unsigned int num_pfns; - u32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX]; + __virtio32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX];...

> > > > > > > > Hi MST, > > > > > > > > I have measured the performance when using a 32K page bitmap, > > > > > > Just to make sure. Do you mean a 32Kbyte bitmap? > > > Covering 1Gbyte of memory? > > Yes. > > > > > > > > > and inflate the balloon to 3GB > > > > of an idle guest

> > > > > > > > Hi MST, > > > > > > > > I have measured the performance when using a 32K page bitmap, > > > > > > Just to make sure. Do you mean a 32Kbyte bitmap? > > > Covering 1Gbyte of memory? > > Yes. > > > > > > > > > and inflate the balloon to 3GB > > > > of an idle guest

...t;kneumoin at virtuozzo.com> Signed-off-by: Denis V. Lunev <den at openvz.org> CC: Michael S. Tsirkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 476c0e3..f6ea8f4 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -202,6 +202,8 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) num = min(num, ARRAY_SIZE(vb->pfns)); mutex_lock(&vb->balloon_lock); + /* We can't release more pag...

...t;kneumoin at virtuozzo.com> Signed-off-by: Denis V. Lunev <den at openvz.org> CC: Michael S. Tsirkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 476c0e3..f6ea8f4 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -202,6 +202,8 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) num = min(num, ARRAY_SIZE(vb->pfns)); mutex_lock(&vb->balloon_lock); + /* We can't release more pag...

...consider this patch for inclusion in the next stable Linux. > --- > drivers/virtio/virtio_balloon.c | 20 ++++++++++++-------- > 1 file changed, 12 insertions(+), 8 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 7b6d74f..476c0e3 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -75,7 +75,7 @@ struct virtio_balloon { > > /* The array of pfns we tell the Host about. */ > unsigned int num_pfns; > - u32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX]; > + __virtio32 p...

...rk can go on top. ---> virtio-balloon: rework deflate to add page to a tmp list Will allow faster notifications using a bitmap down the road. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 476c0e3..44050a3 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -195,8 +195,9 @@ static void release_pages_balloon(struct virtio_balloon *vb) static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) { unsigned num_freed_pages; - struct page *page; + str...

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by